Electric rotary sander



FIG. 1 is a perspective view of an electric rotary sander showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

The broken lines in the drawings depict portions of the electric rotary sander that form no parts of the claimed design. 

CLAIM The ornamental design for an electric rotary sander, as shown and described. 